Word: tritium
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Dates: during 1933-1933
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...recent, rapid discoveries of particles in the atom have sent physicists back to their Greek dictionaries. Hydrogen No.1 (most common) is beginning to be called protium, Hydrogen No. 2 deuterium. Hydrogen No. 3 will therefore have to be tritium. Protium's nucleus is the proton, deuterium's the denton, and tritium's (probably) the triton. After them, in Nature's system of elements, comes helium (atomic weight approximately 4). The helium atom's nucleus is the alpha particle which, in the full round of substances, again appears during the disintegration of the heaviest...